Air-cleaner.



A. C. BENNETT.

AIR CLEANER.

' APPLICATION FILED AUGJG, I917. 1,323,816, Patented Dec. 2,1919.

2 SHEETS-SHEET I- fzwemom X7 85 Key 6567777656.

\ 5/15 f/fforms'y ASHLEY-C. BENNETT, 0F MINNEAPOLIS, MINNESOTA.

AIR-CLEANER.

Specification of Letters Patent.

Patented Dec. 2, 1919.

Application filed August 16, 1917. Serial No. 186,540.

' air cleaning device which shall be adaptable for use particularly inconnection with the cleaning of air for carbureters and for suctioncleaning devices, etc. It is the object of my invention to provide sucha device having an outer casing for admitting the air to be cleanedto'the casing, so that the same will be caused to travel in a cyclone.in the casing, in combination with means in the casing for producingsuitable dead-air collecting space at and below the point of producingthe whirl and providing means acting upon the'return currents so as tocause any dust held therein to bev stopped in its tendency to move withthe air and ultimately to move into the dead-air collecting space.'

The full objects and advantages of my invention will appear inconnection wit the detailed description thereof and are particularlypointed out in the claim.

In the drawings, illustrating the application of my invention in oneform,-

Figure 1 is an elevation view of an ai'r cleaner of thetype described.Fi 2 1s a sectional plan view on line 22 0 Fig. 1.

Fig. 3 is a sectional elevation taken on line 33 of Fig. 2.

- Asillustrated, I provide a cylindrical casing 10 having a slightlyconical top 11 provided with a central aperture through which extends apipe 12, a portion of said pipe as indicated at 13 entering the chamber14 formed bythe casing 10 and extending. into said chamber aconsiderable distance below the top plane of the cylindrical portion 10.

The casing'10 has connected to the lower edge thereof a conicalextension 15 which is provided with a threaded mouth 16 into which isscrewed a collecting receptacle 17 which may conveniently be a glass ar,as shown. I p

Secured within the casing 10 are a multiplicityof spiral trough-likemembers 18 which have their upper ends closed, as 1ndicated at'19 inFig. 2, and their lower ends open as indicated at 20 in Fig. 3. Asshown, there are three of the spiral mem bers, and an aperture 21 opensthrough casing 10 into each of said trough members 18 just in front ofthe closed end wall 19. Air entering chamber 14: in casing 10 must,

therefore, pass through the apertures 21 and the spiral passageways 22formed by troughs 18, and finds its exit from said passageways into thechamber in a plane near the bottom of the cylindrical casing 10 and itsoutlet through pipe extension 13, the lower end of which is insubstantially the horizontal plane of the inlet openings 21. The troughmembers 18 are of such length that the upper and lower ends ofcontiguous members overlie one another, as clearly indicated in Fig; 3,so that the several mem-- bers form in efi'ecta continuous baflie orledge around the interior of casing 10 with breaks or openings in saidbafile as indicated at 23 in Fig. 3.

Below the cylinder 10 and connected with.

the conical extension 15 is a reverse cone 25 the apex of which extendsthrough orv above the plane of formation of the cyclone from .thedelivery ends 20 of the passageways 22, and the lower edge of which isslightly below the junction of the cylindrical casing 10 and the conicalportion 15 and is spaced from the-wall of conical portion 15 a 'distanesuch as to leave an annular passageway 26 Vertical partitions 27 dividethe space below the cone 25 into a multiplicity,

of vertical passageways, thus destroying any tendency of the air towhirl in the dead-air space formed below cone 25. and" in receptacle 17.

The operation of the above parts is as follows: Pipe 12 is'conn'ected tothe suction pipe of an engine or of an air pump orsuc tion device suchas a suction cleaner and whereby currents of air are induced to enterthe chamber 14 within casing 10 through the openings 21 and the spiralpassageways 22, discharging in a slightly downward whirling direction atthe .lower portion of casing 10 and around conical member 25. From herethe air ascends in a whirl, ultimately passing into extension 13 of pipe12 and to and through the suction device. The whirl thus produced isconsequently in effect pyramidal or conical in form, being wide at thebottom and drawn to a comparatively small dimension at the top where itenters the pipe extension 13. The parways 26 but'will tend to move upwith the,

cyclone. These particles will, however, have passed to the outside ofthe whirl, and in their upward movement will encounter the lower wallsof the troughs 18 which act as a bafile or stop. Furthermore, the quickdrawing in of the cyclone in order to reach the extension 13 will bringsuch particles of dirt out of the cyclone when they come 'under thetroughs 18, with the result that they will then gravitate along the wall10,

ultimately passing through openings 23 between the troughs or over theupper ends of the troughs where the, particles of dirt get upon the topof the troughs, and finally reaching the annular openings 26 and thedead-air collecting spaces-leading to recep-v tacle 17. The air passingthrough exten-. sion 13 at a point below the top of the troughbaflie-memb'ers be in a very rapid whirl, such that the finesti'of thedust which might otherwise remain in the air is thrown out of the airbelow the edges of extension 13 and moves along thetops of baflles 18 Yuntil it passes over the ends thereof in the comparative dead-air. spacein the upper part of .the chamber 14 above the lower plane of pipeextension 13, from which such dust will gravitate, downwardly andfinally find its way through annular passages 26 to the collectingspaces and receptacle 17.

I claim:

A dust collector-comprising a cylindrical casing, trough-like membersspirally ar-' ranged on the inside of said casing and forming spiralpassageways for introducing air into the casing and discharging it in acycloneat the bottom part of' said casing,

the lower walls of said passageways forming baflies about the sides ofthe casing,- a central conical bafile extending upwardly from the bottomportion vof. the I casing through the lower planes of said "members, anda discharge pipe extending centrally intothe casing to a pointsubstantially below the top plane thereof and directly above the tip' ofthe conical member.

' In testimony whereof I aflix my. signature, ASHLEY O. BENNETT.

